PaperFree provides free duplicate checking service for the first time when registering, and you can also get the number of words by participating in the official website free duplicate checking activity, and then you need to pay for the test. PaperPass can register an account for free through mobile phone authentication, and give a certain number of words for free test.
The detection principle of PaperFree is to preprocess all fingerprint features of papers submitted by students, and adopt multi-level fingerprint comparison technology combined with deep semantic mining and recognition comparison technology. In addition, the system also has the function of online real-time weight modification, which can realize modification and detection. The detection principle of PaperPass adopts the self-developed dynamic fingerprint leapfrog scanning technology, and the main steps include text preprocessing, semantic mining, automatic depth recognition and so on. , and the detection is carried out in units of sentences.